Improvement in lamps



2 Sheets-Sheet M. McNAMEE.

LAMPS.

Patented July 41,. 187.16

lill

WlTNESSES NfPET-RS. PHoTaurHoenAPu ER, wAsmNaToN. n c.

2 Sheets-Sheet-Z..

M. MeNAMEE.

LAMPS.

Patented July 4,1876.

Nca.17 9,5894.

n n l l n e n n n n.

WITNESSES 'L PETERS, PNOTO-UTHOGRAPHEFL- WASNlNGTONA D. C.

UNITED Ares Y ATENT (DarrenC I MICHAEL MCNAMEE, OF BALTIMORE, MARYLAND,ASSIGNOR OF ONE-HALF 'HIS RIGHT TO GEORGE T. ROSENSTEEL', SR.,AOF SAMEPLACE.

IMPROVEMENT IN LAMPS.

- Specification forming part of Letters `Patent No. l79,589, dated July4, 1876; application iledi June 3 To all whom it may concern Be it knownthat I, MrcHAEL MCNAMEE,

of Baltimore, in the State of ll/Iaryland, have invented certain new anduseful Improvements in Lamps, of which the following is a specification:

My invention relates, primarily, to improvements in the burners of11o-chimney lamps for burning coal-oil; and it consists, first, in an-improvement in the construction of the neck ofthe burner, and in themode of connecting it with the reservoir, to adapt the lamp to receivewicks of large capacity. The invention further consists in an improveddevicefor regulating the height of the lowest portion of the wick, sothat the lamp may be extinguished at agiven hour by the level of the oilfalling below the wick.

In the accompanying drawing, Figure lis a vertical section .of the lampon the line 1 l, Fig. 2. Fig. 2 is a vertical section on the line 2 2,Fig. l; Fig. 3 is aplan or top view. Fig. 4 is a horizontal section onthe line 3 3, Figs. land 2. Fig. 5 is a horizontal section on the line 55, Figs. l and Fig.6 is a vertical section on the line 6, Fig. S,showing the burner applied to a reservoir. Fig. 7 is a vertical sectionon the line 7, Fig. 9. Fig. 8 isa horizontal section on the line S,Figs. 6 and 7. Fig. 9 is a horizontal section on the line 9, Figs. 6and7'.

Thelalnp-burner is constructed with a wicktube, A, formed, asrepresented, with guides a', which constitute atiiroat having theconvoluted section shown in Fig. 5, so as to fold a tlat wick uponitself, permitting it to be passed through a n eck of moderate capacity,and to be spread into a straight wick of greater breadth at top, wherethe flame is formed. l) is the customary duct for conveying directly tothei'lame any gases generated within the oil-reservoir. O is adetlectingshield, causing a strong' lateral current of air to' the flameto support combustion, and preventing anyinju- `rious effect from adownward or horizontal draft. D 'is the 'dellecting-cam, which surmountsthe deector. E E are longitudinal deectors in line with the llame,extending out on either side thereof, so as to cause the llame to spreadfreely on each side in its own plane,

and preventing flaring by drafts of air. The parts O D E are connectedtogether vand hinged tothe shell F of the burner at G, so as to beturned up and back at will, as illustrated in dotted lines in Fig. l, toafford access to the wick for trimming the same. H is the customaryelevatingshaft, with ratchet- Wheels It. The neck I of the burner ispreferably made in elliptical form, and is tted to slide within asocket, J, prepared for it in the lamp, and is held in place byspring-catches K, attached to the burner,'and engaging with suitablenotches or projections j on the socket J.

L represents a perforated metallic shield arranged on 4either side ofthe Wicktube A, and connected at top with the said wick-tube, so as toallow a free current of air to pass around the wick-tube to keep itcool, but preventing any sudden or violent access of said air to theamc. By this means I have completely obviated a leading difficulty anddisadvantage experienced in nochimney lam ps, by'effectuall y preventingthe injurious conduction ofv heat fr( m the dame to the reservoir. Thewick W is attached to the wick-holder S, fitted to slide within thewick-tube, and secured thereto by Vli )s c workin in slots "m in thewick-tube A the lips c (oneor more of them) being formed into indexes,as illustrated in Figs. G and 7, to show by a scale, m', on the exteriorofthe wick` tube the vertical adjustmentot' the wick-holder S.Thisvertical adjustment is for regulating with accuracy the height ofthelowest portion of the wick, which may be the extremity ot' the wick ornot, as preferred. The wick may be passed through the wick-holder andfolded into the upper portion of the wick-receptacle.

Its lower end may be attached directly to the wick-holder, and anysurplus removed Aat top by regulating the height of the holder, asrequired. i

The lamp may be set for burning any desired number of hours, and will beautomatically extinguished on the expiration ot' the time for which itis set by the oil in the reservoir falling below the level ot' the wick.

This device will be seen to constitute an improvement on a device for asimilar purpose described in Letters Patent No. 153,493, granted the28th day of July, 1874, to John- D. Murphy and myself for an improvementin through the neck and expanding; it to its full bread th at the anle.

2. The combination of the reservoir-socket J, elliptical neck I, andspring-catches for connectingand disconnecting the lamp-burner andreservoir, as required.

3. The sliding wick-holder L, index-point, slots m, and scale m', forregulating` the automatic ext-inguishment of the lamp, as eX- plained.

M. MGNAMEE- Witnesses:

' PTON SCOTT,

N. ROBINSON.

